From 104c46d6aad68d28dd01bc978e471e0c1a335431 Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Mon, 5 Sep 2016 14:41:24 +0900
Subject: [PATCH] Don't apply hack multiple times

---
 content/treestyletab/windowHelperHacks.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/content/treestyletab/windowHelperHacks.js b/content/treestyletab/windowHelperHacks.js
index e886ce95..1f8fd8f6 100644
--- a/content/treestyletab/windowHelperHacks.js
+++ b/content/treestyletab/windowHelperHacks.js
@@ -533,8 +533,11 @@ TreeStyleTabWindowHelper.overrideExtensionsAfterBrowserInit = function TSTWH_ove
 		for (let i = 0, maxi = methods.length; i < maxi; i++)
 		{
 			let method = methods[i];
-			if (!(method in LinkyContext.prototype)) continue;
+			if (!(method in LinkyContext.prototype) ||
+				LinkyContext.prototype['__treestyletab__' + method])
+				continue;
 			let orig = LinkyContext.prototype[method];
+			LinkyContext.prototype['__treestyletab__' + method] = orig;
 			LinkyContext.prototype[method] = function(...aArgs) {
 				TreeStyleTabService.readyToOpenChildTabNow(null, true);
 				return orig.call(this, ...aArgs);